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feat(v4.0.0): every error is raised and ends the line (D-18)

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Ruled 2026-10-04: guard all errors.  The errors that set NODE-ERROR and
let the line run on now stop it at once, with a message.

- A store of a non-zero code to NODE-ERROR is a trap, a sixth kind of
  fault: nothing after it executes, the return stack is emptied, and the
  data stack is left as the word left it.  Not attached, NODE-ERROR is
  plain memory, as the tests below the prompt use it.
- The capsule's words store a code where they stored -1, and the prompt's
  (RAISED) prints its message: Negative count, Not a number, Number too
  long, Not a character, Dictionary full, Name missing, Control structure
  mismatch, Control structures too deep.
- ' and COMPILE and [COMPILE] of a word that is not there say
  UNKNOWN WORD: 'xxx', as the interpreter does.
- tests: the trap in test_exec.c; every message from the prompt, with the
  rest of the line not run and the stack kept, in test_host_quit.c.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
rajames
2026-10-04 20:13:23 -04:00
co-authored by Claude Opus 5.5
parent 644bfc0a25
commit dc7e37ba5c
12 changed files with 181 additions and 38 deletions
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v4/capsule/numout.v4
+3 -3
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@@ -43,9 +43,9 @@ header <#
: <# ( -- ) HEND HLD b! !b ;
header HOLD
: HOLD ( c -- )
dup -256 and if OKC drop jump ERR
OKC: drop HLD b! @b -HFLOOR + -if ROOM drop
ERR: drop NODE-ERROR b! -1 !b ;
dup -256 and if OKC drop drop NODE-ERROR b! 4 !b ; \ not a character
OKC: drop HLD b! @b -HFLOOR + -if ROOM
drop drop NODE-ERROR b! 3 !b ; \ the buffer is full
ROOM: drop HLD b! @b -1 + dup !b jump C!
header SIGN
: SIGN ( n -- ) -if L1 drop 45 jump HOLD L1: drop ;